Tri-Y Headers

[MaineShark]

What are the benefits/drawbacks of the "tri-y" style headers, as opposed to the more traditional 4-into-1 headers?

Also, on a related note, would the connection pattern of the tri-y header need to be changed, if a 4/7 cam were installed?

Joe

 

[Ken]

Tri-Ys consist of a four-into-two-into-one design, with four primary pipes paired into two slightly larger-diameter secondary pipes before reaching a single collector. One advantage of this design is that the increasing pipe diameter broadens the torque curve, providing higher torque throughout the low- and mid-rpm range than a similar four-into-one style header. Doug Thorley Headers specializes in tri-Ys, specifically for the RV and truck markets in which lots of low-rpm torque is important.

For more insight into headers, visit www.superchevy-web.com - How Headers Work.